iterating array in javascript

1 varArr=[{name:2,id:3},{name:2,id:4},{name:3,id:5},{name:3,id:6},{name:1,id:1},{name:1,id:2}];2 3 //passing in an array4 //format in a specific way5 functionSortarr (arr, str) {6 var_arr = [],7_t = [],8 //Temporary Variables9 _tmp;Ten One //sorting arrays by specific parameters will have the same worth of rows together Aarr = Arr.sort (function(A, b) { - vars =A[str], -t =B[str]; the - returnS ; - }); - + if(arr.length) { -_tmp = arr[0][str]; + } A

Javascript implements multiple methods for Array deduplication, and javascript implements arrays. Don't talk nonsense, just pick up the dry goods! Let's talk about the requirements of this instance: Write a method to implement de-duplication of arrays. (Requirement: Execute the method, pass an array, and return the new

The Array of Javascript is both an Array and a Dictionary ). Let's take an example to look at the Array usage of Javascript Array, which is both an Array and a Dictionary ). Let's take

The so-called arrays (English: Array), is an ordered sequence of elements. If a collection of variables of the same type is named, the name is an array name. Each variable that makes up an array is called the component of an array, also known as an element of an array, somet

Thanks to the recent brush code on Freecodecamp and the use of many JavaScript array methods, a tutorial on JavaScript is organized, as follows: I. Common methods 1. Join () joins the array elements together and returns as a stringParameters: Optional, specifies the delimiter between elements, and the default is comm

Common methods for array manipulation in JavaScript 1. Detecting arrays1) detects if the object is an array, using the instanceof operatorif (value instanceof Array) {// perform certain actions on array}2) Gets the type of the object, compares whether it is an object type (t

This article is the Reading Notes in Chapter 3, Section 2nd of situ's javascript framework design. This section mainly introduces the extension and repair of javascript arrays, this article selects the key parts for demonstration. 1. indexOf and lastIndexOf methods: Because IE7 reports an error when using indexOf on an array object, you need to override a compat

Array method:About Slice:About Sort:"Arrayobject.sort (Method function)Method functions: Optional, specifies the sort order, which must be a function. If the If the "Method function:The function compares two values and returns a number that describes the relative order of the two values.The comparison function should have two parameters, a, B, and its return value is as follows: A return value of If the return value is >-1 A

The array in JavaScriptToday more comprehensive learning to JS in the array, that is, arrays. Write a blog post to summarize the learning and use of some of the errors in the array and common APIs, to deepen the impression.About the most comprehensive API for array here, MDNNanyi Ruan Teacher's

This article mainly introduces the information about random sorting of arrays in the JavaScript study notes. For more information, see Recommended reading:Array Summation Method for JavaScript learning notes Add, delete, modify, and query the array of JavaScript learning notes The sort () and reverse () methods are pr

This article mainly summarizes the array methods of javascript in detail, including the most commonly used array methods and extension methods. If you are interested, please refer to them. I. Common Methods of Arrays 1: join (); Convert the array into a string for display. If you do not enter a parameter, a comma is

Today, I reviewed the JavaScript array and summarized some of his wonderful behaviors. I will share them with you on the script home platform. You are welcome to refer to the importance of arrays in programming languages, arrays in JavaScript are also one of the most commonly used objects. arrays are ordered sets of values. Due to the weak type, arrays in

This article mainly summarizes the array methods of javascript in detail, including the most commonly used array methods and extension methods. if you are interested, please refer to them. I. common methods of arrays 1: join (); Convert the array into a string for display. If you do not enter a parameter, a comma is

How does Javascript determine the data type and array type, and javascript data type? Such basic things should not be recorded any more. However, let's learn more ~ Let's start with the data type. Js six data types: number, string, object, Boolean, null, undefined String: single or double quotation marks, for example, "string" Number: What integers? floating poin

$array =array ("88", "99", "66", "Hello");echo "";?>Web page!An array of PHP values passed into the JavaScript array

JavaScript converts a numeric array into a function array (each function pops up the corresponding number)varArrnum = [2,3,4,5,6,10,7];varArrfun = [];functionChange (arr) {varFun =function(val) {return function(){ returnVal; }; } for(vari=0;i) {Arrfun.push (arr[i)); } returnArrfun;}varNEWARR =Change (Arrnum); Newarr.foreach (function(Itemfun)

arrayArrayobj.slice (0); Returns a copy array of the array, note that it is a new array, not a pointer to theArrayobj.concat (); Returns a copy array of the array, note that it is a new array, not a pointer to the7 , sorting of

During project development, we often need some algorithms about javascript arrays, such as array deduplication, array intersection, array disruption, and so on. Today, I will share my summary algorithms with you. Today, I will take some time to summarize some of the commonly used a